// Copyright (C) Kumo inc. and its affiliates.
// Author: Jeff.li lijippy@163.com
// All rights reserved.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.
//
#pragma once

#include <pollux/common/future/pollux_promise.h>

namespace kumo::pollux::exec {
    class JoinBridge {
    public:
        virtual ~JoinBridge() = default;

        /// Invoked by the associated task after the driver creations to start this
        /// join bridge before starting task execution.
        virtual void start();

        /// Sets this to a cancelled state and unblocks any waiting activity. This may
        /// happen asynchronously before or after the result has been set.
        void cancel();

    protected:
        static void notify(std::vector<ContinuePromise> promises);

        std::mutex mutex_;
        bool started_{false};
        std::vector<ContinuePromise> promises_;
        bool cancelled_{false};
    };
} // namespace kumo::pollux::exec
